Scarified.

J got a new toy last week.  It was very much needed as he was trying to rake the moss out of the grass with a very large hand-held forked tool.  If you look to the left of the shot you can see how green the "grass" was;  He bought a machine online that takes the effort out of the work, but it took him 4 days to clear the moss from the front "lawn".  Before he began the task he ordered a fertiliser for the grass and this morning, that came in a tub that took two men to carry to the front door. 
It apparently has all sorts of nutrients that make your grass grow green and healthy.  I can't wait to see that.